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Finding the Fourth Proportional to 1,891.88, 2,611.20 and 1,052.87

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Solution

The fourth proportional to 1,891.88, 2,611.20 and 1,052.87 is: 1,453.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,891.88 : 2,611.20 = 1,052.87 : x
  2. Step 2: Convert to fraction form
    1,891.88/2,611.20 = 1,052.87/x
  3. Step 3: Cross multiply
    1,891.88x = 2,611.20 × 1,052.87
  4. Step 4: Simplify right side
    1,891.88x = 2,749,254.14
  5. Step 5: Solve for x
    x = 2,749,254.14/1,891.88
  6. Step 6: Final answer
    x = 1,453.19

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.